Connect with a TaxPro →

Alabama Business Tax Extension | C Corporation Filing Guide

Form BPT-V  ·  C Corporation  ·  Business Filing Guide

Overview of Alabama Business Privilege Tax Extension

Alabama C Corporations are subject to the Alabama Business Privilege Tax (BPT), administered by the Alabama Department of Revenue. Corporations doing business in Alabama or organized under Alabama law must file a Business Privilege Tax return annually. If additional time is needed to file, Alabama provides an automatic six-month extension tied to an approved federal extension from the IRS—making the process straightforward for businesses that have already filed IRS Form 7004.

Original Filing Deadline

The original due date for filing the Alabama Business Privilege Tax return for C Corporations is April 15, 2026 (for the 2025 tax year). This deadline aligns with the federal corporate income tax return due date.

Extension Period & Extended Deadline

Alabama automatically grants a 6-month extension to file your Business Privilege Tax return, provided you have obtained an approved federal extension from the IRS. With a valid IRS extension in place, the Alabama extended filing deadline becomes October 15, 2026. No separate state extension form is required—the federal extension approval serves as your Alabama extension.

Payment Is Still Due by April 15

The extension applies to filing only—it is not an extension to pay any taxes owed. 100% of your outstanding Alabama Business Privilege Tax liability must be paid by the original due date of April 15, 2026 to avoid penalties and interest. Even with a valid extension to file, any unpaid tax balance remaining after April 15 will accrue late payment penalties. Settle your full tax liability by the original deadline regardless of whether you intend to file on extension.

How to Pay

Alabama requires online payment for tax amounts of $750 or more. Use the Alabama Online Tax Extension Payment portal to submit your payment electronically. For paper payments under $750, use Form BPT-V (Business Privilege Tax Payment Voucher) and mail to:

Alabama Department of Revenue · Business Privilege Tax Section · P.O. Box 327320 · Montgomery, AL 36132-7320

Working with a Tax Professional

Business tax returns are complex—a licensed CPA or Enrolled Agent can maximize deductions, ensure accurate BPT calculations, and handle filing on your behalf. Here's how working with a TaxPro typically goes:

1. 1Get matched with a verified U.S.-based CPA or Enrolled Agent
2. 2Upload your business documents via secure drag-and-drop
3. 3Review and approve your return with upfront, transparent fees
4. 4Your TaxPro files your Alabama return by October 15, 2026

Late Filing and Payment Penalties

• Failure to File: 10% of any additional tax required to be paid, or $50—whichever is greater.
• Failure to Pay: 1% of the tax due for the first month, plus 1% for each additional month or fraction thereof, up to a maximum of 25%.

Best Practices

• Estimate and pay your Alabama Business Privilege Tax by April 15, 2026 to avoid interest and penalties.
• File IRS Form 7004 to secure your federal extension, which Alabama automatically honors.
• Use the Alabama online payment portal for payments of $750 or more—it is required by the state.
• Set a reminder to have your completed Alabama Business Privilege Tax return filed by October 15, 2026.

Final Thoughts

Alabama's automatic business tax extension is straightforward—no separate state form is needed once your federal extension is approved. The critical obligation is paying 100% of any tax due by April 15, 2026. Use the Alabama online payment portal for required electronic payments, and ensure your Business Privilege Tax return is filed by October 15, 2026.

Quick Reference Table

State Abbreviation	AL
State Name	Alabama
Business Entity Type	Corporations (C Corporations)
Extension Status	Approved with Federal Extension
Return Due Date	April 15, 2026
Extended Due Date	October 15, 2026
Other Information	Alabama grants an automatic 6-month extension provided you have obtained an approved IRS extension. The extension is NOT an extension to pay any taxes due. 100% of outstanding tax liability must be paid by the original due date to avoid penalties. Tax payments of $750 or more must be made online.
Online Payment	Alabama | Online Tax Extension Payment
Payment Voucher Form	Form BPT-V | Business Privilege Tax Payment Voucher
State Payment Agency	Alabama Department of Revenue
Mailing Address with Payment	Alabama Department of Revenue Business Privilege Tax Section P.O. Box 327320 Montgomery, AL 36132-7320
Failure to File Penalties	10% of any additional tax required to be paid, or $50—whichever is greater.
Failure to Pay Penalties	1% of tax due for first month, plus 1% for each additional month or fraction thereof, up to a maximum of 25%.